chore(deps): update actions/checkout action to v4.1.4 (#18)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

.github/workflows/validate-renovate-config.yaml

@@ -13,6 +13,6 @@ jobs:
       image: renovate/renovate:latest
       options: --user root
     steps:
-      - uses: actions/checkout@1d96c772d19495a3b5c517cd2bc0cb401ea0529f # v4.1.3
+      - uses: actions/checkout@0ad4b8fadaa221de15dcec353f45205ec38ea70b # v4.1.4
       - run: renovate --version
       - run: renovate-config-validator default.json